Bobbin for spinning



June 12, 1934. H. LAMPART BOBBIN FOR SPINNING Filed Aug. 7, 1930 Patented June 12, 1934 UNITED STATES BOBBIN FOR SPINNING Hugo Lampart, Karlsruhe, Germany, assignor to 1 Berlin Karlsruher Industrie Werke A. G.,

Karlsruhe, Germany Application August 7, 1930, Serial No. 473,703 In Germany January 3, 1930 3 Claims.

My invention relates to improvements in bobbins for spinning with beaded edges from any material capable of being rolled, and particularly suitable for the rayon industry. The bobbins or spools of this kind manufactured heretofore were provided with thickened edges or reinforced rims which were more or less hollow and had the defect that the acids and the like used for finishing the bobbins penetrated into the cavities of the edges and thus formed the starting point for oxidation or any other decomposition phenomena of the metal body. Even by careful removal of the acid by washing and otherwise treating the bobbins and in spite of the coating of varnish or lacquer applied later on, it was hitherto impossible to eliminate the detrimental consequences mentioned. Later on also when the bobbins were in use in the spinning process of the artificial silk this coating of varnish did not prevent the entry of acids or stop the decomposition or corrosion at these hollow beadings however carefully they had been closed. M

According to my invention this drawback is efi'ectively eliminated by turning the edges over on themselves either inwardly or outwardly and which are pressed together to form jointless solid closed headings, thickened rims or flanges or reinforced edges.

In the drawing aflixed to my specification and forming part thereof Figure 1 shows a spinning bpbbin in elevation, on a reduced scale, a

Figure 2 the inwardlytumed over edge of one .end of 'a bobbin according to my invention in cross-section and on an enlarged scale, and

Figure 3 an outwardly turned over edge, likewise in cross-section and on an enlarged scale.

The two ends a: and y of a spinning bobbin or spool a, Fig. 1, are turned over on themselves and pressed together into any desired solid or closed shape, Figs. 2 and 3, so that at the turning over point a joint is merely formed and no cavity. The turning over of the edge may take place either inwardly, as the rim y in Fig. 2, or outwardly, as the rim y in Fig. 3.

By my improved bobbin, the penetration or accumulation of substances used in the manufacturing processes, such as acids and the like,.at and within the edges of the bobbins is effectively avoided and thus the life of the bobbin extended and any adverse action of the substances on the wound bobbin or spool or any subsequent baths and the like rendered impossible.

I- claim as my.invention:-

1. A metallic spinning bobbin particularly for rayon, comprising a cylindrical shell; and an outwardly-turned beaded rim, or edge on each end of the shell, each turned rim bearing tightly'against the shell forming a thickened and jointed solid edge to prevent the entry of acids into the joint.

2. A metallic spinning bobbin particularly for rayon, comprising a cylindrical shell; and an. inwardly-turned beaded rim or edge on each end of the shell, each turned rim bearing tightly against the shell forming a thickened and jointed solid edge to prevent the entry of acids into -the joint.

3. A metallic spinning bobbin particularly for rayon, comprising a cylindrical shell; and a turned beaded rim or edge on each end of the shell, each turned rim bearing tightly against the shell forming a thickened and Jointed solid edge to prevent the entry of acids into the joint.

HUGO LAMPART. 

